Black Oxide Coating Process

Black oxide is a conversion coating created by a chemical reaction with the oxidizers and the metal to form an integral protective surface. Applications to ferrous alloys and metals begin as oxidizing salts react with iron magnetite, the "black oxide" of iron. This reaction creates a fusion resulting in complete integration with the metal and alloy it protects, adding less than 5 to 10 millionths of an inch to the dimension of the surface. An oil, wax, or other coating is applied after treatment to give additional corrosion protection. 

Black oxide is commonly used in the aerospace industry for transmission and hydraulic systems, where the finish will be constantly coated with oil, or for other moving parts that cannot tolerate the dimensional change of a more corrosion resistant finish. You will also see many types of fasteners with a black oxide finish, including black oxide bolts, black oxide nuts, and black oxide screws. Many customers also require black oxide stainless steel fasteners for their applications.

ADVANTAGES OF BLACK OXIDE

• Versatility - The black oxide process can be applied to many diverse metals including: carbon, alloy and stainless steels, copper, brass, bronze, die cast zinc, and cast iron.
• Dimensional Stability - Black xxide's success is due to its ability to give cosmetic appeal without affecting dimensional properties.
  
• Durability - The finish will not chip, craze, peel or rub off.  The only way to remove the finish is by mechanical or chemical methods.
  
• Protection - Oxidized surfaces have an excellent ability to absorb oils, waxes and lacquers. This enhances the appearance while protecting the treated metal or alloy.

PRODUCTION CAPACITY

• Parts up to 7’ or 84” in length
• High Volume Rack and Barrel
• Parts up 2,000 lbs. in weight
• Customers can supply their own parts to be black oxided or purchase directly through AFT.
• Available on alloys, stainless, copper and brass

BLACK OXIDE SPECIFICATIONS

• AMS - 2485G
• MIL - STD - 13924D
• MIL - F - 495
• Can Meet Most Private Black Oxide Specs

Please submit a Request for Quote form or contact us at 972-988-1999 with any questions on our Black Oxide Services.

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AFT's Black Oxide Coating